Saves another 70k on the x86_64 binary, more on x86.
None of the included C or Zig code will unwind the stack at any point,
so these sections seem pretty useless.
And do dynamic buffer allocation for bin_export, removing 128k of
.rodata that I accidentally introduced earlier and reducing memory use
for parallel scans.
Static binaries now also include the minimal version of zstd, current
sizes for x86_64 are:
582k ncdu-2.5
601k ncdu-new-nocompress
765k ncdu-new-zstd
That's not great, but also not awful. Even zlib or LZ4 would've resulted
in a 700k binary.
Still not a fan of roff, but even less a fan of build system stuff and a
dependency on a tool that is getting less ubiquitous over time.
I've removed the "hard links" section from the man page for now. Such a
section might be useful, but much of it was outdated.
The ZIG variable helps to test ncdu with different zig installations,
and it allows Gentoo to inject the zig version that should be used to
build zig into the Makefile.
Also add a phony 'build' target as first target to the Makefile so
that it becomes the default target. This allows the Gentoo package to
use the default src_compile() function.
See also https://bugs.gentoo.org/900547
It's a bit ugly, but appears to work. I've not tested the 32bit arm
version, but the others run.
The static binaries are about twice as large as the ncdu 1.x
counterparts.
